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(ModeL) SheetsSheet 1. W. R. PARK.

- INJECTOR. No. 524,685. Patented Aug. 14, 1894.

2 Sheets-Sheet 2. W. R. PARK. INJECTOR.

(ModeL) No. 524,685. Patented Aug. 14, 1894.

UNITED STATES PATENT OFFICE.

'WILLIAM R. PARK, OF TAUNTON, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

HIRAM H. JENKINS AND GEORGE 0. JENKINS, OF WHITMAN, MASSA- CHUSETTS.

INJECTOR.

SPECIFICATION forming part of Letters Patent No. 524,685, dated August 14, 1894.

Appli i n fi September 25. 1891- Serial No, 406,787. (Model) To all whom it may concern.-

Be it known that I, WILLIAM ROBERT PARK, of Taunton, in the county of Bristol and State of Massachusetts, have invented an Improved Injector, of which the following is a specification, reference being had to the accompany- 7 trolling the fiow of steam into the two passages leading to the lifter and forcer, and a regulating valve between the lifter and the main valve and controlling the flow through the passage to the lifter. These four elenients are singly old but I am the first to supply both litter and forcer from a common source through one main valve and to regulate the supply to the lifter at pleasure without adjustment of the main valve.

In practice after the jet is established through the litter the steam can be shut 0E wholly from the lifter nozzle by the regulating valve in my combination, and thereby give the minimum rate of feed; or the steam can be turned full onto the lifter nozzle by opening the regulating valve to its full exgenze, and thereby give the maximum rate of In the drawings A is the lifter nozzle, and A its tube.

B is the forcer nozzle made annular by the end of tube A projecting into it, and B its tube.

The steam is first admitted through the forcer nozzle A, entraining the water and forces the jet through tube A, and when in full operation this jet accelerated by the steam from the annular forcer nozzle B passes through tube B filling high pressure chamthat water escapes from high pressure chamber D until the overflow valve h is closed.

The regulating valve F, shown as a screw plug with a conical end regulates the quantity of steam which flows through the lifter nozzle A, and thereby tends to regulate the quantity of waterpassing through tube A; but as the steam from the forcer nozzle B will also in my apparatus keep up a-jet through tube A, after such a jet is once established, valve F may be screwed down close on its seat (the mouth of nozzle A) without breaking the jet.

In that form of my apparatus shown steam is admitted to the lifter nozzle A through conduit a which is controlled primarily by valve a carried by rod 01, so that at the first part of the outward movement of rod a? valve a is moved from its seat in valve 19 and steam flows past valve 0/ and through passages in valve 1) to conduit a and through lifter nozzle A. But when rod a is moved farther, it carries with it valve Z), allowing a free flow of steam into conduit (1, and also into conduit 1), which supplies forcer nozzle B.

Rod a? is pinned to lever 0, whose fulcrum is on links a; the inner ends of which fit on trunnions projecting from the body of the injector.

The long link a actuates rock shaft H one arm of which is connected by link it with the overflow valve 71. from the high pressure chamber; as will be fully understood by all skilled in the art.

The cam lever G serves to force overflow valve (1 on its seat and hold it there when required.

The operation is as follows: The regulating valve F being open, lover a is moved admitting steam first to lifter nozzle A; and

starting the jet, water flowing out of the overflow and through both overflow valvesd and h until the jet is strong enough to make a partial vacuum in chamber D, when overflow valve d closes automatically. The further motion of lever a in the same direction admits steam to forcer nozzle B, increasing the force of the jet, and also closing overflow Valve h from the high pressure chamber D, the pressure in which chamber has then become sufficient to force open the check valve 0, against boiler pressure. The rate of feed is then regulated by the regulating valve F, which aifects the operation of both nozzles, throwing more and more the duty of a lifter nozzle on the forcer nozzleB, as it diminishes the duty of the lifter nozzle A. The reverse motion of lever a opens overflow valve h and and its tube; a main valve controlling the flow of steam into the passages leading to the lifter and forcer, and a regulating valve between the main valve and the lifter and controlling the flow of steam through the passage leading to thelifter, substantially as described.

WM. R. PARK.

Witnesses:

J. E. MAYNADIER, EDWARD S. BEACH. 

